What kinds of hot air guns can be divided into?
Normal type Heavy Duty Hot Air Gun
This kind of hot air gun is mainly characterized by unstable temperature, high and low, and unstable air volume. The scale of this air gun only adjusts its power, so the temperature is very slow when starting up, for several minutes, and then the temperature rises sharply. If you don't pay attention, you will burn everything. Such as power amplifier, CPU, circuit board, etc. Although it also has temperature detection, it seems that it is only used for over temperature protection, and does not really adjust the temperature value. It is suggested that we do not often pay for the machine in order to save money.
Standard type electric heat guns
The scale of this hot air gun is really used to adjust the temperature. It can be reached in tens of seconds when starting up, and the temperature will not rise in a straight line. It can be adjusted in a small range, and the air volume is relatively stable. It is suitable for repairing mobile phones. I use this air gun very well. For example, more than 90% of the CPU of 3508 will not burn out.
Digital temperature display type Mini heat gun FBelec Brand
This is basically the same as the second performance, that is, there are multiple digital temperature displays, some of which are very accurate and accurate. However, some display temperature is inaccurate, which is easy to produce false perception. In addition, according to the different manufacturers and production sooner or later, the products that were long ago may not be practical.
In addition, the actual use temperature measured by the digital thermometer is: (small head air nozzle) 350-400 degrees at the air outlet, about 300-350 degrees at one centimeter and 260-300 degrees at two centimetres. It can be tested with a digital multimeter with thermometer.
At the same time, some machines are equipped with power or other voltage and current indicating dials. Some parts can be replaced.
If a hot-air gun without digital temperature is used, it can be estimated by blowing a piece of paper at 3cm. If the paper will not turn black soon, it is appropriate to turn yellow slowly.
High temperature type
The high temperature hot air gun can be used only when the temperature can reach 800 ℃ or even 900 ℃ and must be fixed on the equipment and connected with compressed air or high-pressure air source.
The high-temperature hot air gun is generally equipped with one or two temperature sensors for temperature control, and also equipped with an anti dry burning device to prevent the heating wire from overheating and burning out due to lack of air.
Operation instructions for hot air gun:
1. Before use, make sure it is reliably grounded to prevent static electricity on the tool from damaging components.
2. The temperature and air volume shall be adjusted to the appropriate temperature and air volume, and the temperature and air volume of the hot air gun shall be adjusted according to the shape and working requirements of different nozzles; The disassembly and welding time of resistance, capacitance and other micro components is about 5 seconds, the general IC disassembly and welding time is about 15 seconds, and the disassembly and welding time of small BGA is about 30 seconds, The disassembly and welding time of large BGA is about 50 seconds (for example, when the a1130 nozzle is used for the white light 850B hot air gun, the air volume is adjusted to level 1 and the temperature is adjusted to level 3.5; when the nozzle is not used, the air volume is adjusted to level 4 and the temperature is adjusted to level 4. When the a1130 nozzle is used for the digital atten850d, the air volume is adjusted to level 3 and the temperature is adjusted to 350 degrees; when the nozzle is not used, the air volume is adjusted to level 4.5 and the temperature is adjusted to 380 degrees).
3. When turning on the power switch, preheat the hot-air gun until the temperature is stable before welding. When in use, the welding iron part shall be evenly heated at 1 ~ 2cm above the element, and the element shall not be touched; Pay attention to the safety of surrounding components during disassembly and welding.
4. Do not use too much force when installing the nozzle, and do not strike the worktable with the welding iron to give a strong impact, so as to avoid damage to the heating wire and high-temperature glass.
5. Be very careful during high-temperature operation. Do not use a hot-air gun near flammable gases and flammable objects. Pay attention to personal safety. Turn off the power supply and wait for it to cool when replacing components and leaving. Unplug the power plug if it is not used for a long time.
6. When the work is completed, turn off the power switch and start the automatic cooling period. Do not pull out the power plug during the cooling period
